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Are suspicious activity reporting requirements for cryptocurrency exchanges effective?

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Financial Innovation 2021年第1期7卷 1634-1650页

作者： Daehan Kim Mehmet Huseyin Bilgin Doojin ryu College of Economics Sungkyunkwan UniversitySeoul 03063Republic of Korea Faculty of Political Sciences Istanbul Medeniyet UniversityIstanbulTurkey

This study analyzes the impact of a newly emerging type of anti-money laundering regulation that obligates cryptocurrency exchanges to report suspicious transactions to financial *** build a theoretical model for the reporting decision structure of a private bank or cryptocurrency exchange and show that an inferior ability to detect money laundering(ML)increases the ratio of reported transactions to unreported *** a representative money launderer makes an optimal portfolio choice,then this ratio increases *** findings suggest that cryptocurrency exchanges will exhibit more excessive reporting behavior under this regulation than private *** attribute this result to cryptocurrency exchanges’inferior ML detection abilities and their proximity to the underground economy.

关键词： Cryptocurrency Cryptocurrency exchange Financial regulation Money laundering Portfolio choice

Clinical features and literature review related to the material differences in thread rhinoplasty:Two case reports

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World Journal of Clinical Cases 2021年第31期9卷 9635-9644页

作者： Da Woon Lee Heongrae ryu Si-Hyong Jang Jun Hyuk Kim Department of Plastic and Reconstructive Surgery College of MedicineSoonchunhyang UniversityCheonan 31151Chungcheongnam-doSouth Korea Department of Pathology College of MedicineSoonchunhyang UniversityCheonan 31151Chungcheongnam-doSouth Korea

BACKGROUND Thread rhinoplasty can trigger a reaction to thread material,which is a foreign *** compared clinical features induced by absorbable and non-absorbable threads following thread *** SUMMARY Two patients who underwent different thread materials showed different clinical courses and different Hounsfield unit(HU)values in computed *** with absorbable thread showed high HU values similar to a metallic material,and the HU value of inflammation was similar to vascular tissues with a lot of water(250).In the intraoperative field,absorbable thread materials and micro-abscesses were *** contrast,in the case of a non-absorbable thread,an object presumed to be thread was seen on the computed tomography(CT),and the HU value of inflammatory tissues was less than *** both patients,post-operative HU decreased to less than 100 and the clinical course *** both cases,histopathologic findings revealed foreign body granuloma associated with *** Absorbable threads were more aggressive and are more easily detected on CT.

关键词： Thread rhinoplasty Polydioxanone Polyprophylene Hounsfield unit Computed tomography

Absorption-Dominant mmWave EMI Shielding Films with Ultralow Reflection using Ferromagnetic Resonance Frequency Tunable M-Type Ferrites

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Nano-Micro Letters 2023年第6期15卷 1-23页

作者： Horim Lee Seung Han ryu Suk Jin Kwon Jae ryung Choi Sang‑bok Lee Byeongjin Park Composites Research Division Korea Institute of Materials Science797 ChangwondaeroSeongsan‑GuChangwonGyeongsangnam‑Do 51508Republic of Korea

Although there is a high demand for absorption-dominant electromagnetic interference(EMI) shielding materials for 5G millimeter-wave(mmWave) frequencies, most current shielding materials are based on reflection-dominant conductive materials. While there are few absorption-dominant shielding materials proposed with magnetic materials, their working frequencies are usually limited to under 30 GHz. In this study, a novel multi-band absorption-dominant EMI shielding film with M-type strontium ferrites and a conductive grid is proposed. This film shows ultralow EMI reflection of less than 5% in multiple mmWave frequency bands with sub-millimeter thicknesses, while shielding more than 99.9% of EMI. The ultralow reflection frequency bands are controllable by tuning the ferromagnetic resonance frequency of M-type strontium ferrites and composite layer geometries. Two examples of shielding films with ultralow reflection frequencies, one for 39 and 52 GHz 5G telecommunication bands and the other for 60 and 77 GHz autonomous radar bands, are presented. The remarkably low reflectance and thinness of the proposed films provide an important advancement toward the commercialization of EMI shielding materials for 5G mmWave applications.

关键词： 5G communication MmWave EMI shielding M-type ferrites

Predictive value of E-cadherin and Ep CAM for detection of metastatic lymph node in early gastric cancer

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Chinese Journal of Cancer Research 2020年第5期32卷 614-620页

作者： Bang Wool Eom Keun Won ryu Hong Man Yoon Myeong-Cherl Kook Center for Gastric Cancer National Cancer CenterGoyang-si 10408Republic of Korea

Objective:There has been a demand for a tumor-specific marker for metastatic lymph nodes in sentinel navigation surgery for gastric *** aim of this study is to analyze protein expression in both primary tumors and metastatic lymph nodes in early gastric cancer ***:We collected primary tumors and metastatic lymph nodes from 71 patients who underwent curative gastrectomy and pathologically diagnosed with T1 N1 or T1 N2(8 th Union for International Cancer Control 8 th edition/American Joint Committee on Cancer staging system)gastric *** was used to determine the expression of six cell membrane proteins,including carcinoembryonic antigen(CEA),E-cadherin,epithelial cell adhesion molecule(Ep CAM),P-cadherin,CD44 v6,and c-erb B2 in the patient ***:The expression of CEA,E-cadherin,Ep CAM,P-cadherin,CD44 v6 and c-erb B2 in the evaluable primary tumor samples was 75.4%,97.1%,100%,89.9%,11.1%and 7.2%,*** cases wherein both the primary tumor and metastatic lymph nodes were evaluable,double positivity(expression in both primary tumor and metastatic lymph nodes)was observed for CEA,E-cadherin,Ep CAM,P-cadherin,CD44 v6 and c-erb B2 in 53.2%,97.9%,98.1%,76.6%,0 and 6.8%of the cases,*** proportion of metastatic lymph nodes positive for CEA,E-cadherin,Ep CAM,P-cadherin,CD44 v6 and c-erb B2 was 71.4%,100%,98.1%,83.7%,0,and75%,respectively in primary tumors positive for the same ***:E-cadherin and Ep CAM had an overlap of 100%and 98.1%between the primary tumor and metastatic lymph nodes,***,E-cadherin and Ep CAM are potential molecular markers to detect metastatic lymph nodes in patients with early gastric cancer.

关键词： Gastric cancer tumor-associated protein E-cadherin EpCAM lymph node

A mixed behaviour equilibrium model with mode choice and its application to the endogenous demand of automated vehicles

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Journal of Management Science and Engineering 2020年第4期5卷 227-248页

作者： Guangchao Wang Hang Qi Huiling Xu Seungkyu ryu School of Information Management Central China Normal UniversityWuhan430079China Institute for Advanced Studies in Finance and Economics Hubei University of EconomicsWuhan430205China Korea Institute Science Technology Information Dajeon02792South Korea

This study develops a mixed behavioural equilibrium model with explicit consideration of mode choice(MBE-MC)in a transportation system where fully automated vehicles(AV)coexist with conventional human-driven vehicles(HV).For the mode choice,travellers select among three options,following a logit modal split:driving their private HV,or taking an AV mobility service provided by either a firm or the *** the route choice,the HV drivers follow the random utility maximisation principle while central agents route the AV passengers following the Cournot Nash(firm agent)or Social Optimal(government agent)*** consider two types of travel costs(*** time and monetary travel cost)to characterise the new features(*** link capacity and reduced value of time)of the mixed AVeHV transportation *** model the MBE-MC problem in a combined modeeroute choice framework and formulate it as a route-based variational inequality(VI)*** show the equivalence between the VI formulation and the MBE-MC problem,and the existence of a solution to the MBE-MC ***,we modify a partial linearisation algorithm for solving the proposed *** results validate the equilibrium conditions and show the efficacy of the new model in capturing the features of the mixed AVeHV transportation *** impact patterns of different parameters on(1)the network performance in terms of AV share and system cost and(2)on the solution efficiency are analysed.

关键词： Mixed behaviour equilibrium Automated vehicle SUE-CN-SO Combined travel choices Variational inequality

Influence of recycled polyethylene terephthalate fibres on plastic shrinkage and mechanical properties of concrete

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Frontiers of Structural and Civil Engineering 2022年第6期16卷 792-802页

作者： NecatÖZAŞIK Özgür EREN Department of Civil Engineering Eastern Mediterranean UniversityMersin 99628Turkey

Polyethylene terephthalate bottles production has drastically increased year after year due to high versatility of polyethylene terephthalate plastics and considerable consumption of *** tandem with that increase,the major concern of society has been the improper disposal of this non-biodegradable material to the *** deal with this concern,recycled polyethylene terephthalate bottles were incorporated in concrete as fibre reinforcements in this *** objective of this research is to evaluate the mechanical properties of recycled polyethylene terephthalate fibre reinforced concrete(RPFRC)in comparison with control concrete without *** terephthalate fibres with three different diameters(0.45,0.65,and 1.0 mm)and two lengths(20 and 30 mm)were added at various proportions(0.5%,1.0%,1.5%and 2.0%)by volume of concrete in order to determine the effect of fibres initially on compressive,flexural and splitting tensile strengths of *** results revealed that none of the fibres have detrimental effects up to 1%volume fraction,however further addition caused slight reductions on mechanical properties in some *** shrinkage resistance and impact resistance tests were also performed according to related *** terephthalate fibres were observed to have marked improvements on those *** a good performance could be attributed primarily to the bridging effect of fibres.

关键词： recycled PET fibre-reinforced concrete mechanical properties plastic shrinkage impact energy

Magnetic wallpaper Dirac fermions and topological magnetic Dirac insulators

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npj Computational Materials 2023年第1期9卷 1695-1702页

作者： Yoonseok Hwang Yuting Qian Junha Kang jehyun Lee Dongchoon ryu Hong Chul Choi Bohm-Jung Yang Center for Correlated Electron Systems Institute for Basic Science(IBS)Seoul 08826Korea Department of Physics and Astronomy Seoul National UniversitySeoul 08826Korea Center for Theoretical Physics(CTP) Seoul National UniversitySeoul 08826Korea

Topological crystalline insulators(TCIs)can host anomalous surface states which inherits the characteristics of crystalline symmetry that protects the bulk ***,the diversity of magnetic crystalline symmetries indicates the potential for novel magnetic TCIs with distinct surface ***,we propose a topological magnetic Dirac insulator(TMDI),whose two-dimensional surface hosts fourfold-degenerate Dirac fermions protected by either the p'_(c)4mm or p40 g0 m magnetic wallpaper *** bulk topology of TMDIs is protected by diagonal mirror symmetries,which give chiral dispersion of surface Dirac fermions and mirror-protected hinge *** propose candidate materials for TMDIs including Nd_(4)Te_(8)Cl_(4)O_(2)0 and DyB_(4) based on first-principles calculations,and construct a general scheme for searching TMDIs using the space group of paramagnetic parent *** theoretical discovery of TMDIs will facilitate future research on magnetic TCIs and illustrate a distinct way to achieve anomalous surface states in magnetic crystals.

关键词： Dirac topological protected

Longwave infrared multispectral image sensor system using aluminum-germanium plasmonic filter arrays Noor E

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Nano Research 2023年第7期16卷 10018-10025页

作者： Karishma Shaik Bryce Widdicombe Dechuan Sun Sam E John Dongryeol ryu Ampalavanapillai Nirmalathas Ranjith R Unnithan Department of Electrical and Electronic Engineering University of MelbourneParkvilleVIC 3010Australia Department of Biomedical Engineering University of MelbourneParkvilleVIC 3010Australia Department of Infrastructure Engineering University of MelbourneParkvilleVIC 3010Australia

A multispectral camera records image data in various wavelengths across the electromagnetic spectrum to acquire additional information that a conventional camera fails to *** the advent of high-resolution image sensors and color filter technologies,multispectral imagers in the visible wavelengths have become popular with increasing commercial viability in the last ***,multispectral imaging in longwave infrared(LWir,8-14μm)is still an emerging area due to the limited availability of optical materials,filter technologies,and high-resolution *** from LWir multispectral cameras can capture emission spectra of objects to extract additional information that a human eye fails to capture and thus have important applications in precision agriculture,forestry,medicine,and object *** this work,we experimentally demonstrate an LWir multispectral image sensor with three wavelength bands using optical elements made of an aluminum(Al)-based plasmonic filter array sandwiched in germanium(Ge).To realize the multispectral sensor,the filter arrays are then integrated into a three-dimensional(3D)printed wheel stacked on a low-resolution monochrome thermal *** prototype device is calibrated using a blackbody and its thermal output has been enhanced with computer vision *** applying a state-of-theart deep learning method,we have also reconstructed multispectral images to a better spatial ***,our work demonstrates a versatile spectral thermography technique for detecting target signatures in the LWir range and other advanced spectral analyses.

关键词： infrared plasmonics germanium(Ge) aluminum(Al) thermal optics longwave infrared(LWir)multispectral system

An Efficient Viewport-Dependent 360 VR System Based on Adaptive Tiled Streaming

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Computers, Materials & Continua 2021年第3期66卷 2627-2643页

作者： Tuan Thanh Le Jong-Beom jeong Sang Soon Lee Jaehyoun Kim Eun-Seok ryu Department of Computer Engineering Gachon UniversitySeongnam13120Korea Department of Computer Education Sungkyunkwan UniversitySeoul03063Korea

Recent advances in 360 video streaming technologies have enhanced the immersive experience of video streaming ***,there is immense potential for the application of 360 video encoding formats to achieve highly immersive virtual reality(VR)***,360 video streaming requires considerable bandwidth,and its performance depends on several ***,the optimization of 360 video bitstreams according to viewport texture is ***,we propose an adaptive solution for VR systems using viewport-dependent tiled 360 video *** increase the degrees of freedom of users,the moving picture experts group(MPEG)recently defined three degrees plus of freedom(3DoF+)and six degrees of freedom(6DoF)to support free user movement within camera-captured *** proposed method supports 6DoF to allow users to move their heads ***,we propose viewport-dependent tiled 360 video streaming based on users’head *** proposed system generates an adaptive bitstream using tile sets that are selected according to a parameter set of user’s viewport *** extracted bitstream is then transmitted to the user’s *** decoding,the user’s viewport is generated and rendered on VR head-mounted display(HMD).Furthermore,we introduce certain approaches to reduce the motion-to-photon *** experimental results demonstrated that,in contrast with non-tiled streaming,the proposed method achieved high-performance 360 video streaming for VR systems,with a 25.89%BD-rate saving for Y-PSNR and 61.16%for decoding time.

关键词： Virtual reality 360 video MPEGimmersive 6DoF MCTS viewportdependent